ive just swapped my 97 sfs for a bsa ultra tench regged ive just put a string of 40 shots over for 37 shots it never deviated from 589fps the first 2 were 590 then last the last 1 was 588fps ive had loads of guns even my mk2 rapid was nowere near as good as that anybody else got a tech regged ultra with the same results just put on the bsa multi shot conversion which is also a tidy bit of kit and very easy to use